P603-1 / P750 set. RF conducted measurement IEC
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1 User manual Probe set set RF conducted measurement IEC Copyright July 2016 LANGER GmbH User manual P603-1+P750 GM CS Kö.doc
2 Table of contents: Page 1 General description 3 2 P603-1 probe General Description Design and function of the P603-1 probe 8 3 P750 probe General Description Design and function of the P750 probe 11 4 Measurement set-up Performing the measurement Using the ChipScan-ESA software 15 5 Safety instructions 21 6 Warranty 21 7 Technical specifications P603-1 probe P750 probe 23 8 Scope of delivery
3 1 General description The P603-1 and P750 probes have been developed to measure conducted emissions from integrated circuits (ICs) with direct 1 Ohm/150 Ohm coupling. The probes can be used to perform measurements on ICs according to IEC (Figure 1). The P603-1 probe corresponds to the 1 Ohm RF current probe head. The P750 probe corresponds to the impedance matching network according to IEC It has an input impedance of 150 Ohm. The P750 probe can be used to perform RF voltage measurements and the P603-1 probe can be used for RF current measurements on IC pins. Figure 1 Test set-up according to IEC with the P Ohm RF current probe head (current measurement) and the P750 impedance matching network (voltage measurement). The P603-1 and P750 probe can also be used for other measurement tasks: 1. Current measurement (P603-1) on concatenated Vdd pins (with external capacity), Figure 2 2. Current measurement (P603-1) on a single Vss pin, Figure 3 3. Current measurement (P603-1) on a single Vdd pin (with external capacity), Figure 4 4. Voltage measurement (P750) on a signal pin while this is in operation, Figure 5 5. Current measurement (P603-1) on a signal pin while this is in operation (with external capacity), Figure 6 6. Voltage measurement (P750) on a Vdd or Vss pin, Figure 7-3 -
4 Figure 2 P603-1, current measurement with a direct current block (C ext ) on concatenated Vdd pins. Figure 3 P603-1, current measurement on a single Vss pin
5 Figure 4 P603-1, current measurement on a single Vdd pin with exteral DC-decoupling.. Figure 5 P750, voltage measurement on a signal pin while this is in operation
6 Figure 6 P603-1, current measurement on a signal pin while this is in operation. The external capacitor C ext can reduce the stress on the signal pin caused by the probe's low impedance (1 Ohm) (Figure 6) during current measurements on signal pins. The impedance of the capacitor C ext should be at least 3 db smaller than the shunt's 1 Ohm resistance. Figure 7 P750, voltage measurement on a Vdd pin - 6 -
7 An IC internal connection to other Vdd supply pins is assumed for a voltage measurement on a Vdd pin (Figure 7). This measurement enables the determination of voltage dips on the IC's internal Vdd network. The test IC is soldered to the test board 1 (Figure 8). The P603-1 and P750 probes can be moved freely on the GND 25 ground plane or GNDA ground adapter 2 (Figure 8). Unlike the measurement set-up according to IEC , this set-up ensures that the P603-1 or P750 probe's pin contact can reach and contact each IC pin. The probes are fixed on the ground plane with magnets. Filter elements and bridges are located on the underside (bottom) of the test board to prepare the measurement set-up for contact with the probe (Figure 10). Figure 8 Measurement set-up according to the 1 Ohm method with P603-1 and the 150 Ohm method with P750. Figure 9 Sectional view of the measurement setup. The same test board is used for all measurement methods (1 Ohm, 150 Ohm). Bridges are provided to the Vdd / Vss root at the Vdd / Vss pins in the initial state. The associated bridge to the root is removed and the corresponding filter becomes active if a Vdd / Vss pin is measured. Figure 10 Design of the test board; top with Vss bridges, bottom with back-up capacitors, filters and quartz crystal oscillator circuit. 1 The test board is described in the "IC test instruction manual", 2 GNDA 02 ground adapter and GND 25 ground plane are included in the ICE1 IC test environment
8 2 P603-1 probe 2.1 General Description The P603-1 probe is an RF current probe head to measure conducted RF currents on IC pins according to IEC The measurement is performed with a 1 Ohm shunt. Figure 11 P603-1 probe 2.2 Design and function of the P603-1 probe Figure 12 Design of the P603-1 probe The P603-1 probe contains a 1 Ohm current probe head (IEC ). The input of the current probe head is connected to the probe's pin contact (Figure 12). The output of the current probe head is connected to the 50 Ohm SMB port at the rear end of the probe. A cable is used to connect the probe's output to a measuring instrument such as a spectrum analyser. The voltage measured is equivalent to the current measured
9 Figure 13 Internal P603-1 design Figure 13 shows the equivalent circuit diagram of the P603-1 probe. The current probe head comprises a 1 Ohm shunt and a 49 Ohm matching resistor. An additional capacitor C ext can be inserted between the test IC and the probe to reduce the stress on the signal pins caused by the 1 Ohm shunt. The P603-1 current probe head has an inductance L P of 1 nh in the line from the tip of the probe contact to the shunt. This value and the associated measurement error are much smaller than the value achieved with the set-up according to IEC The pin contact of the probe has to be brought into contact with the respective test IC pin to perform the measurement. Please refer to the ICE1 user manual 1 and IC test instructions
10 Figure 14 Design of the P603-1 Vdd / Vss and signal pin filters Figure 14 shows the design of the Vdd / Vss and signal pin filters which are located on the bottom of the test board. Please refer to the IC test instructions 1 for a guideline on how to set up a test board
11 3 P750 probe 3.1 General Description The P750 probe is a matching network to measure conducted RF voltages on IC pins according to IEC The P750 has been designed for measurements on supply (Vdd / Vss) and signal pins. The measurement is performed with a 150 Ohm voltage divider. Figure 15 P750 probe 3.2 Design and function of the P750 probe Figure 16 Design of the P750 probe The P750 probe contains a 150 Ohm matching network (IEC ). The input of the matching network is connected to the probe's pin contact (Figure 16). The output of the matching network is connected to the 50 Ohm SMB port at the rear end of the probe. A cable is used to connect the probe's output to a measuring instrument such as a spectrum analyser
12 Figure 17 Internal P750 design Figure 17 shows the equivalent circuit diagram of the P750 probe. The matching network comprises a 120 Ohm 51 Ohm voltage divider and a 6.8 nf coupling capacitor. The pin contact of the probe has to be brought into contact with the respective test IC pin to perform the measurement. Please refer to the ICE1 user manual and IC test instructions 1. Figure 18 Design of the P750 Vdd / Vss and signal pin filters Figure 18 shows the design of the Vdd / Vss and signal pin filters which are located on the bottom of the test board. Please refer to the IC test instructions for a guideline on how to set up a test board
13 4 Measurement set-up 4.1 Performing the measurement Figure 19 shows the measurement set-up to measure conducted emissions from integrated circuits (ICs). The test IC is mounted on the test board. The test board is inserted into the corresponding ground adapter such as GNDA The signal and supply connections to the test IC are established through a plug connector on the test board. The test IC is supplied via the test board and controlled via the connection board. The associated Connection Board Control software can be used to control and monitor the test IC from a PC. The P603-1 or P750 probe is placed on the GND 25 2 ground plane with the GNDA 02 ground adapter. The respective pin of the test IC can be contacted with the pin contact by moving the probe manually. The microscope camera (Figure 19) optically detects if and when contact is made. The camera's image is displayed on the PC monitor via the ChipScan-ESA software (Figure 21). The video image on the PC monitor enables the user to assess the connection to the respective IC pin. The spectrum analyser displays the RF signal that occurs if and when contact is made. The pins of the test IC can also be contacted automatically if an ICT1 automatic IC tester is available. The ICT1 automatic tester enables automatic measurements. The AV input of the spectrum analyser is connected to the SMB output of the probe via an SMA-SMB 1 m RF cable. The ChipScan-ESA software makes it easy to perform and document the measurements (see also: ChipScan-ESA operating instructions ). Figure 19 Measurement set-up to measure conducted emissions from integrated circuits (ICs) with the IC test system. Components marked * are not included in the scope of delivery of the "P603-1 and P750 RF conducted emissions IEC " probe set. 1 The GNDA 02 ground adapter is included in the ICE1 IC test environment. 2 The GND 25 ground plane is included in the ICE1 IC test environment
14 Figure 20 Test set-up with the P603-1 probe set and ICE1 test environment without a control unit and microscope camera. Figure 21 Pin contact visualised with the digital microscope camera
15 4.2 Using the ChipScan-ESA software The spectrum analyser is sought automatically with "Devices/ Devices Manager/ Detected Devices" via the respective interface and connected to the PC (Figure 23). Figure 22 Connecting the spectrum analyser to the PC. Figure 23 Main settings of the spectrum analyser in the "Spectrum Analyser Manager" (right side). The main settings of the spectrum analyser have to be defined in the "Spectrum Analyser Manager" (Figure 23). The correction curve K603-1 or K750 has to be used to correct the frequency response of U AV (ω) measured with the P603-1 or P750 probe. U AV (ω) can be converted to I IC (ω) and U IC (ω) automatically under "Correction" in the "Spectrum Analyser Manager". The correction curve K603-1 or K750 has to be used for this purpose
16 Mathematical functions can also be used (Figure 24): division by ω in the time domain, for example. This corresponds to a subtraction of 20 Log ω in the logarithmic form. You can find the correction curve (- 20 Log ω) in the "Corrections" list of the "Trace Manager". Click the "Select" button (mouse cursor 1 Figure 24) under "Correction" in the "Spectrum Analyzer Manager" to select the respective correction curve. Figure 24 Using mathematical functions by activation in the "Corrections Selector". The "Corrections Selector" window opens Figure 24. Click and activate the correction curve -20 Log ω with the mouse cursor 2. Click the "Arrow right" 3 button to move the correction curve to the "Applied Corrections" list. Other correction factors and correction curves (Figure 25) such as K603-1 or K750 can be loaded in the same way or selectively (Figure 25)
17 Figure 25 Loading the correction curves K750 to the "Corrections Selector". The correction curve K603-1 is loaded to the "Corrections Selector" if the P603-1 probe is used for the measurement. Activate the "Enabled" box in the "Correction" field in the "Spectrum Analyzer Manager" with the mouse cursor 1 (Figure 26). The field 2 flashes if the correction is active Figure 26. Click "Take" or "Measure" (mouse cursor 3 Figure 26) to transfer the current measurement curve 4 I IC (ω) from the spectrum analyzer to the PC. The calculation: I IC (ω) = U AV (ω) +K603-1 is automatically performed at the same time. The curve I IC (ω) is added to the bottom of the "Traces" list in the "Trace Manager". A measurement log can be kept in the free text field under "Comment". Delete the check mark from the "Enabled" box if you only want to measure U AV (ω); the field 2 then stops flashing
18 Figure 26 Measurement with the P603-1 RF current probe head using the correction curve K The "Curve" number is counted automatically (Curve 3) under "Annotation". The measurement log can be kept in the respective free text field under "Comment". The correction can also be made later on if the measurement has been carried out using the P750 probe without any correction. The correction curve U IC (ω) = U AV (ω) +K750 has then to be added. You can find the correction curve K750 in the "Corrections" list of the "Trace Manager". Click the "Select" button (mouse cursor 1 Figure 27) under "Correction" in the "Spectrum Analyzer Manager" to select the respective correction curve
19 Figure 27 Correction after the measurement; copying K750 from the "Corrections" list to the "Traces" list Mark the "Curve 1" (U AV ) curve and the "K750" curve in the "Traces" list Figure 28 in the "Trace Manager" with the mouse cursor 1. Open the mathematical operation "Add " (addition) and activate "Sum up all Plots" (Figure 28 mouse cursor 3). Click OK 4 to perform the addition U AV + K750. Figure 28 Correction after the measurement; performing the addition U IC = U AV + K750 The calculation creates the entry (1 Figure 29) at the bottom of the "Traces" list and is displayed as "Curve 5" (2 Figure 29)
20 Figure 29 Correction after the measurement; result of the addition U IC = U AV + K750 The user manuals for the respective devices are listed in the following table: Task Instructions for the development of the adapter board Test process GND 25 ground plane CB 0708 connection board OA 4005 oscilloscope adapter TH 22 probe head holder Monitoring and controlling the test IC Operating instructions IC test guideline (Langer GmbH) ICE1 user manual Table
21 5 Safety instructions This product complies with the requirements of the following European Community Directives: 2014/30/EU (Electromagnetic Compatibility) and 2014/35/EU (Low Voltage) When using the LANGER GmbH product please observe the following basic safety instructions to protect yourself against electric shock and the risk of injury: - Read and comply with the operating manual and keep the it in a safe place for subsequent use. - Only personnel who are qualified in the field of EMC and fit for working under the influence of disturbance voltages and magnetic as well as electric fields may use the device. - Follow the safety instructions and warnings on the unit. - Always perform a visual check of the LANGER GmbH product before use. - Do not leave the LANGER GmbH product unsupervised. - Read the explanation of the symbols on the unit in the operating manual. - The LANGER GmbH product is only in use in applications it has been designed for. Any other use is not permitted. - Do not switch the LANGER GmbH product on until it has been completely assembled. - Damaged connection cables must be replaced! Attention: Function-related near fields and disturbance emissions may develop, particularly in connection with a test set-up while operating the product of the LANGER GmbH. The user is responsible for measures to ensure that the intended use of products which are installed outside the companys EMC environment is not adversely effected (particularly by disturbance emission). 6 Warranty Langer GmbH will remedy any fault due to defective material or defective manufacture, either by repair or by delivery of replacement, during the statutory warranty period. This warranty is only granted on condition that: - the information and instructions in the user manual have been observed. The warranty will be forfeited if: - an unauthorized repair is performed on the product, - the product is modified, - the product is not used according to its intended purpose
22 7 Technical specifications 7.1 P603-1 probe Shunt Transfer factor V out / V in Current correction factor R Max. power dissipation shunt Inductance of RF input RF measuring output Frequency range 1 Ω -6 db -6 dbω 2.5 W 1 nh 50 Ω (SMB) 0.2 khz 3 GHz Characteristics of the probe P603-1 Figure 30 P603-1 characteristic
23 7.2 P750 probe Transfer factor V out / V in Frequency range Input resistance Max. input voltage for RF Max. input voltage for DC RF measuring output db 150 khz to 3 GHz 150 Ω 3.5 V 50 V 50 Ω (SMB) Characteristics of the probe P750 Figure 31 P750 characteristic
24 8 Scope of delivery Item Designation Type Quantity 01 RF current probe 1 ohm P RF voltage probe 150 ohm P Measurement cable SMA-SMB 1 m 1 04 ChipScan-ESA software CS-ESA 1 05 User manual 1 06 Case insert/quick guide 1 07 System case 1 This document may not be copied, reproduced or electronically processed, either in its entirety or in part, without the prior written permission of Langer GmbH. The management of Langer GmbH assumes no liability for damage that may arise from using this printed information. LANGER Nöthnitzer Hang 31 Tel.: +49(0)351/ GmbH Fax: +49(0)351/
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